life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Superkingdom Prokarya see Domain Bacteria Woese et al. 1990 Kingdom Bacteria (Cohn 1870) Cavalier-Smith 1983 - bacteria see Kingdom Bacteria Cavalier-Smith 2002 Subkingdom Eubacteria Cavalier-Smith 1981 see Domain Bacteria Woese et al. 1990 Division Gracilicutes Gibbons and Murray 1978 (Approved Lists 1980) see Phylum Gracilicutes Phylum Proteobacteria Garrity and Holt 2001 see Phylum Proteobacteria Garrity et al. 2005 "Alpha Group" see Class Alphaproteobacteria Garrity et al. 2006 Genus Rhodopseudomonas Czurda and Maresch 1937 (Approved Lists 1980)